In c++ please I need it as a example for another program ,thread is in picture .

Exercise P5.9. Implement a class Student. For the purpose of this pxercise, a student has a name and a total quiz score. Supply an appropriate constructor and functions get_nameO, add quiz(int score), get total scoreO, and get average scoreO. To compute the latter, you also need to store the number of quizzes chat the student took Exercise P5.10. Modify the Student class of Exercise P5.9 to compute grade point averages. Member functions are needed to add a grade, and get the current GPA. Specify grades as elements of a class Crade. Supply a constructor that constructs a grade from a string, such as "B+". You will also need a function that translates grades into their numeric values (for example, "B+" becomes 3.3)